import auth from '@/plugins/auth'
import router, { constantRoutes, dynamicRoutes } from '@/router'
import { getRouters } from '@/api/menu'
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView'
import InnerLink from '@/layout/components/InnerLink'

const permission = {
  state: {
    routes: [],
    addRoutes: [],
    defaultRoutes: [],
    topbarRouters: [],
    sidebarRouters: []
  },
  mutations: {
    SET_ROUTES: (state, routes) => {
      state.addRoutes = routes
      state.routes = constantRoutes.concat(routes)
    },
    SET_DEFAULT_ROUTES: (state, routes) => {
      state.defaultRoutes = constantRoutes.concat(routes)
    },
    SET_TOPBAR_ROUTES: (state, routes) => {
      state.topbarRouters = routes
    },
    SET_SIDEBAR_ROUTERS: (state, routes) => {
      state.sidebarRouters = routes
    },
  },
  actions: {
    // 生成路由
    GenerateRoutes({ commit }) {
      return new Promise(resolve => {
        // 向后端请求路由数据
        getRouters().then(res => {
          const sdata = JSON.parse(JSON.stringify(res.data))
          const rdata = JSON.parse(JSON.stringify(res.data))
          const sidebarRoutes = filterAsyncRouter(sdata)
          const rewriteRoutes = filterAsyncRouter(rdata, false, true)
          const asyncRoutes = filterDynamicRoutes(dynamicRoutes)
          rewriteRoutes.push({ path: '*', redirect: '/404', hidden: true })
          router.addRoutes(asyncRoutes)
          commit('SET_ROUTES', rewriteRoutes)
          commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
          commit('SET_DEFAULT_ROUTES', sidebarRoutes)
          commit('SET_TOPBAR_ROUTES', sidebarRoutes)
          resolve(rewriteRoutes)
        })
      })
    }
  }
}

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
  // 系统管理分组增强（自定义五大分组）
  asyncRouterMap.forEach(route => {
    if (route.path === '/system' && Array.isArray(route.children)) {
      // 1. 信用购物
      const creditShopping = [
        'good', 'goodOrder', 'goodInfo', 'goodClick', 'shop', 'shopType'
      ];
      // 2. 酒店预订管理
      const hotelBooking = [
        'hotel', 'hotelType', 'room', 'roomInfo', 'roomOrder'
      ];
      // 3. 房屋租赁管理
      const houseRental = [
        'house', 'houseInfo', 'houseOrder', 'owner', 'ownerType', 'follow'
      ];
      // 4. 亲社会行为管理
      const prosocial = [
        'activity', 'activityInfo', 'activityOrder', 'accumulation',
        'organizer', 'organizerType', 'news', 'newsType', 'newsComments'
      ];
      // 5. 用户管理
      const userManage = [
        'user', 'role', 'dept', 'post', 'menu', 'dict', 'config', 'notice', 'operlog', 'logininfor', 'commonUser', 'commonUserInfo'
      ];

      function extractChildren(keys) {
        return route.children.filter(child => keys.includes(child.path));
      }
      function removeChildren(keys) {
        route.children = route.children.filter(child => !keys.includes(child.path));
      }
      // 插入分组父节点
      const groups = [
        {
          key: 'creditShopping',
          title: '信用购物',
          icon: 'shopping-cart',
          children: extractChildren(creditShopping)
        },
        {
          key: 'hotelBooking',
          title: '酒店预订管理',
          icon: 'hotel',
          children: extractChildren(hotelBooking)
        },
        {
          key: 'houseRental',
          title: '房屋租赁管理',
          icon: 'house',
          children: extractChildren(houseRental)
        },
        {
          key: 'prosocial',
          title: '亲社会行为管理',
          icon: 'heart',
          children: extractChildren(prosocial)
        },
        {
          key: 'userManage',
          title: '用户管理',
          icon: 'user',
          children: extractChildren(userManage)
        }
      ];
      // 移除已分组的原始节点
      removeChildren([...creditShopping, ...hotelBooking, ...houseRental, ...prosocial, ...userManage]);
      // 只添加有子节点的分组
      groups.forEach(g => {
        if (g.children.length > 0) {
          route.children.unshift({
            path: `${route.path}/${g.key}`,
            component: 'ParentView',
            alwaysShow: true,
            meta: { title: g.title, icon: g.icon },
            children: g.children
          });
        }
      });
    }
  });
  return asyncRouterMap.filter(route => {
    if (type && route.children) {
      route.children = filterChildren(route.children)
    }
    if (route.component) {
      // Layout ParentView 组件特殊处理
      if (route.component === 'Layout') {
        route.component = Layout
      } else if (route.component === 'ParentView') {
        route.component = ParentView
      } else if (route.component === 'InnerLink') {
        route.component = InnerLink
      } else {
        route.component = loadView(route.component)
      }
    }
    if (route.children != null && route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children, route, type)
    } else {
      delete route['children']
      delete route['redirect']
    }
    return true
  })
}

function filterChildren(childrenMap, lastRouter = false) {
  var children = []
  childrenMap.forEach(el => {
    el.path = lastRouter ? lastRouter.path + '/' + el.path : el.path
    if (el.children && el.children.length && el.component === 'ParentView') {
      children = children.concat(filterChildren(el.children, el))
    } else {
      children.push(el)
    }
  })
  return children
}

// 动态路由遍历，验证是否具备权限
export function filterDynamicRoutes(routes) {
  const res = []
  routes.forEach(route => {
    if (route.permissions) {
      if (auth.hasPermiOr(route.permissions)) {
        res.push(route)
      }
    } else if (route.roles) {
      if (auth.hasRoleOr(route.roles)) {
        res.push(route)
      }
    }
  })
  return res
}

export const loadView = (view) => {
  if (process.env.NODE_ENV === 'development') {
    return (resolve) => require([`@/views/${view}`], resolve)
  } else {
    // 使用 import 实现生产环境的路由懒加载
    return () => import(`@/views/${view}`)
  }
}

export default permission
